Atomization spray disc, spherical silicon boride ceramic powder, and preparation method and application of spherical silicon boride ceramic powder

Abstract

The invention belongs to the technical field of silicon boride ceramic powder production, and particularly relates to an atomization spray disc, a spherical silicon boride ceramic powder, and a preparation method and application of the spherical silicon boride ceramic powder. The atomization spray disc comprises: a liquid guide pipe; a crucible positioning circular truncated cone, wherein the smaller bottom surface of the crucible positioning circular truncated cone is connected with the inlet of the liquid guide pipe, so that the molten liquid enters the liquid guide pipe along the crucible; and atomized gas inlet pipes located on the two sides of the liquid guide pipe, wherein spraying holes are formed in the ends, close to the liquid guide pipe, of the atomized gas inlet pipes. The atomized gas is suitable for being sprayed out from the spraying holes in the two sides so as to crush the molten liquid to form powder particles. According to the atomization spray disc, the problems of obtaining of silicon boride spherical powder and uniformity of composite material components are solved, so that silicon boride ceramic powder which is high in sphericity degree, good in fluidity and smooth and stable in conveying state is obtained, and the silicon boride ceramic powder can be used as a research and development material of a spraying coating and a boron-doped novel battery silicon negative electrode material.

Description

technical field [0001] The invention belongs to the technical field of silicon boride ceramic powder production, and in particular relates to an atomization spray pan, spherical silicon boride ceramic powder and a preparation method and application thereof. Background technique [0002] Silicon boride can be used as a variety of standard abrasives, grinding hard alloys, engineering ceramic materials, sandblasting nozzles, blades of gas engines and other special-shaped sintered parts and seals. Some existing preparation methods are mainly ball milling, vapor deposition or thermal phase sintering, and the obtained silicon boride powders are all non-spherical powders. Used in supersonic spraying, plasma spraying, laser cladding and other equipment. [0003] The existing preparation methods of silicon boride powder materials such as ball milling, vapor deposition or thermal phase sintering, etc., the obtained powders are all non-spherical, the friction between the piled state i...

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Problems solved by technology

[0003] The existing preparation methods of silicon boride powder materials such as ball milling, vapor deposition or thermal phase sintering, etc., the obtained powders are all non-spherical, the friction between the piled state is large, and the fluidity is poor. The gravity conveying applied on the spraying equipment In the air-flow conveying method, the powder is in the conveying pipeline, which is prone to jams and pauses, intermittent powder feeding, and in severe cases, flow interruption will occur; resulting in uneven thickness of the coating surface during the spraying process, and uneven coating status at different positions , it is expected that the corresponding functions of the coating will be seriously affected, and even cause the workpiece to be scrapped

The composition uniformity of the powder prepared by the above method is also poor, the deviation is large and the controllability is poor, which will also affect the performance of the coating to varying degrees; in the research and application of boron-doped new battery silicon negative electrode materials limited

[0004] The reason for the formation of silicon boride powder is due to the unique process characteristics and limitations of these preparation methods. For the development and application of high-temperature ceramic coating technology, the spraying process and coating performance of high-temperature insulation materials have brought Negative Effects

In addition, there are many inconveniences in the research and application of new battery silicon anode materials and electronic functional materials.

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